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Diet Drug Wins FDA's Approval

WASHINGTON—The Food and Drug Administration Wednesday approved a new weight-loss drug made by Arena Pharmaceuticals Inc., marking the first new drug treatment in more than a decade.

The drug, lorcaserin, will be marketed under the brand name Belviq and distributed by Eisai Co. Ltd. The approval comes more than a month after an FDA advisory panel voted to back the use of the product. The approval of Belviq and other anti-obesity drugs...